Resident Population in Coles County, IL was 46.06000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Coles County, IL reached a record high of 53.86500 in January of 2010 and a record low of 46.06000 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Coles County, IL - last updated from the United States Federal Reserve on May of 2024.